/*---------------------------------------------------------------------------*\
    OneFLOW - LargeScale Multiphysics Scientific Simulation Environment
    Copyright (C) 2017-2022 He Xin and the OneFLOW contributors.
-------------------------------------------------------------------------------
License
    This file is part of OneFLOW.

    OneFLOW is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    OneFLOW is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OneFLOW.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/
#pragma once
#include "Configure.h"
#include <chrono>
#include <string>


BeginNameSpace( ONEFLOW )

class TimeTest
{
public:
    using clock_type = std::chrono::time_point<std::chrono::system_clock>;
public:
    TimeTest();
    ~TimeTest();
public:
    void Restart();
    void Stop();

    double ElapsedMilliseconds();
    double ElapsedSeconds();
    void ShowTimeSpan( const std::string & title = "" );
public:
    void RunTest();
private:
    clock_type time_old;
    clock_type time_now;
    bool       bRunning = false;
};


EndNameSpace
